remcos | 958e5d7947f48f2047ac3c595ee724a916c9969430731091ac1b9fcfaaf65d70

Analysis

max time kernel
148s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06/11/2024, 11:11

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General

Target

FACF9877656789000.bat.exe
Size

1.2MB
MD5

4e6fb77e41ce6e4e8ddec2a04c51b135
SHA1

3f3c04d941792d7598bc6e1fb1814c44ca3d1cf4
SHA256

958e5d7947f48f2047ac3c595ee724a916c9969430731091ac1b9fcfaaf65d70
SHA512

0835f76379fc423c5e194bc8e852492bd68bf7b885f14e07d1dd1878d16d9a1a91153e47d484bc58cecca106547444b87587dfa8d6897acfa10f0efe5b08d619
SSDEEP

24576:tthEVaPqLopaxpymFCZqtRGGAsL4+ktZuStEJz992or8rekadSfU84w:VEVUcI0pyrwtRGGA6mgStLo8uEf

Score

10^/10

remcos remotehost collection discovery rat upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

192.3.101.137:8780

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-EFS67M
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Detected Nirsoft tools 8 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/3156-46-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1128-47-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3232-49-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3232-44-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1128-43-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3232-42-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1128-41-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3156-53-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1128-47-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/1128-43-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/1128-41-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3156-46-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3156-53-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\selectedly.vbs	selectedly.exe

Executes dropped EXE 1 IoCs

pid	Process
3488	selectedly.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 4 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/2212-9-0x0000000000400000-0x00000000004C2000-memory.dmp	autoit_exe
behavioral2/memory/3488-10-0x0000000000400000-0x00000000004C2000-memory.dmp	autoit_exe
behavioral2/memory/3488-14-0x00000000040F0000-0x00000000044F0000-memory.dmp	autoit_exe
behavioral2/memory/3488-27-0x0000000000400000-0x00000000004C2000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3488 set thread context of 1600	3488	selectedly.exe	89
PID 1600 set thread context of 3156	1600	svchost.exe	102
PID 1600 set thread context of 1128	1600	svchost.exe	104
PID 1600 set thread context of 3232	1600	svchost.exe	105

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2212-0-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/2212-9-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/3488-10-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/files/0x0002000000022b13-7.dat	upx
behavioral2/memory/3488-27-0x0000000000400000-0x00000000004C2000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1796	3488	WerFault.exe	87

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FACF9877656789000.bat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	selectedly.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3232	svchost.exe
3232	svchost.exe
3156	svchost.exe
3156	svchost.exe
3156	svchost.exe
3156	svchost.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
3488	selectedly.exe
1600	svchost.exe
1600	svchost.exe
1600	svchost.exe
1600	svchost.exe
1600	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3232	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1600	svchost.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 3488	2212	FACF9877656789000.bat.exe	87
PID 2212 wrote to memory of 3488	2212	FACF9877656789000.bat.exe	87
PID 2212 wrote to memory of 3488	2212	FACF9877656789000.bat.exe	87
PID 3488 wrote to memory of 1600	3488	selectedly.exe	89
PID 3488 wrote to memory of 1600	3488	selectedly.exe	89
PID 3488 wrote to memory of 1600	3488	selectedly.exe	89
PID 3488 wrote to memory of 1600	3488	selectedly.exe	89
PID 1600 wrote to memory of 3716	1600	svchost.exe	101
PID 1600 wrote to memory of 3716	1600	svchost.exe	101
PID 1600 wrote to memory of 3716	1600	svchost.exe	101
PID 1600 wrote to memory of 3156	1600	svchost.exe	102
PID 1600 wrote to memory of 3156	1600	svchost.exe	102
PID 1600 wrote to memory of 3156	1600	svchost.exe	102
PID 1600 wrote to memory of 3156	1600	svchost.exe	102
PID 1600 wrote to memory of 3800	1600	svchost.exe	103
PID 1600 wrote to memory of 3800	1600	svchost.exe	103
PID 1600 wrote to memory of 3800	1600	svchost.exe	103
PID 1600 wrote to memory of 1128	1600	svchost.exe	104
PID 1600 wrote to memory of 1128	1600	svchost.exe	104
PID 1600 wrote to memory of 1128	1600	svchost.exe	104
PID 1600 wrote to memory of 1128	1600	svchost.exe	104
PID 1600 wrote to memory of 3232	1600	svchost.exe	105
PID 1600 wrote to memory of 3232	1600	svchost.exe	105
PID 1600 wrote to memory of 3232	1600	svchost.exe	105
PID 1600 wrote to memory of 3232	1600	svchost.exe	105

C:\Users\Admin\AppData\Local\Temp\FACF9877656789000.bat.exe
"C:\Users\Admin\AppData\Local\Temp\FACF9877656789000.bat.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Users\Admin\AppData\Local\rhombical\selectedly.exe
  "C:\Users\Admin\AppData\Local\Temp\FACF9877656789000.bat.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3488
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\FACF9877656789000.bat.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1600
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\excawra"
      4⤵
      PID:3716
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\excawra"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:3156
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ozhlwkljgjz"
      4⤵
      PID:3800
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ozhlwkljgjz"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:1128
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ytudxcwcurrupi"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3232
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3488 -s 748
    3⤵
    - Program crash
    PID:1796

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3488 -ip 3488
1⤵
PID:4404

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
39b2f6e8a16dc241a7def8fc88d0806d

SHA1
36f132bd05159a2505b17c9cf960680c9cf820b3

SHA256
6386607cef9579b5840d7244f349f55a53a89c711340b8b2e6fcd534b79f0ea8

SHA512
8cabd4908f7411cfabbb6343bb5c483186bb627e91eb376619815a34faf9d60be7043260c5a1c26bc16b301ae2f95869a0f5400f1a17bdcebf6320087fe0a291

Download Submit
C:\Users\Admin\AppData\Local\Temp\excawra

Filesize
4KB

MD5
ac300aeaf27709e2067788fdd4624843

SHA1
e98edd4615d35de96e30f1a0e13c05b42ee7eb7b

SHA256
d2637d58bb120dc6fefe2f38d6e0d4b308006b8639106a7f9e915fa80b5cc9d9

SHA512
09c46e708f9d253dccd4d943639d9f8126f868ae3dcd951aad12222bb98b5d3814676f878c8391b9bdab5dedcf5b9e9eaeb2ad3ffec57bda875198735586d4df

Download Submit
C:\Users\Admin\AppData\Local\rhombical\selectedly.exe

Filesize
1.2MB

MD5
4e6fb77e41ce6e4e8ddec2a04c51b135

SHA1
3f3c04d941792d7598bc6e1fb1814c44ca3d1cf4

SHA256
958e5d7947f48f2047ac3c595ee724a916c9969430731091ac1b9fcfaaf65d70

SHA512
0835f76379fc423c5e194bc8e852492bd68bf7b885f14e07d1dd1878d16d9a1a91153e47d484bc58cecca106547444b87587dfa8d6897acfa10f0efe5b08d619

Download Submit
memory/1128-33-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1128-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1128-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1128-47-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1128-38-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1600-59-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1600-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-93-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-92-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-55-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1600-84-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-83-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-16-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-58-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1600-65-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-62-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2212-3-0x00000000044C0000-0x00000000048C0000-memory.dmp

Filesize
4.0MB

Download
memory/2212-9-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/2212-0-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/3156-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3156-53-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3156-45-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3156-46-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3156-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3232-40-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3232-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3232-44-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3232-49-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3232-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3488-10-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/3488-14-0x00000000040F0000-0x00000000044F0000-memory.dmp

Filesize
4.0MB

Download
memory/3488-27-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download